Question

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1. Earthquakes are detected by which of the following?

Richter scale
barometer
global positioning system
seismograph

2. Which of the following statements about S waves is true?

S waves arrive at a seismograph station first.
S waves are also called secondary waves.
S waves travel through solids, liquids, and gases.
S waves move in a pulsating motion.

Answer 1

2.
`\displaystyle S\:waves\:are\:also\:called\:secondary\:waves.`

1.
`\displaystyle Ritcher\:scale`

Step-by-step explanation:

2. Seismic waves vibrate from side to side and up and down. They go through solids only, travel slower than Pressure [or Primary] waves, which arrive second, and shake the ground violently.

1. A Ritcher scale senses the magnitude of earthquakes.

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